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texts 67
COLLECTION
TOPIC
Biology 3
Electric machinery 3
Railroads 3
Structural analysis (Engineering) 3
Zoology 3
Cells 2
Chemistry 2
City planning 2
Electricity 2
Internal combustion engines 2
Logarithms 2
Magnetism 2
Mathematics 2
Ore deposits 2
Psychophysiology 2
Trigonometry 2
United States -- Economic conditions 1918-1945 2
Astrochemie 1
Automobiles 1
Biological transport 1
Budget in business 1
Calculus 1
Chemistry, Analytic 1
Chemistry, Technical 1
Ciudades y pueblos 1
Civic improvement 1
Color 1
Color printing 1
Copper 1
Copper alloys 1
Dielectrics 1
Electric circuits 1
Electric currents 1
Electric engineering 1
Electric insulators and insulation 1
Electric power distribution 1
Electrical engineering 1
Embryology -- Insects 1
Embryology -- Myriapoda 1
Genetics 1
Geochemistry 1
Geology 1
Geometry, Descriptive 1
Growth (Plants) 1
Hafnium 1
Heredity 1
Heredity, Human 1
Impression sérigraphique 1
Invertebrates 1
Machine-tools 1
Mathématiques 1
Motion study 1
Plant hormones 1
Plants, Motion of fluids in 1
Population 1
Precious stones 1
Profit-sharing. 1
Protoplasm 1
Psychophysiologie 1
Quimica 1
Radiation, Ionizing 1
Radio 1
Radio advertising 1
Radio broadcasting 1
Radio plays 1
Railroad engineering 1
Röntgenspectroscopie 1
Sedimentation and deposition 1
Serigraphy 1
Sewage 1
Sewerage 1
Social problems 1
Social problems. 1
Sociology 1
Sociology. 1
Spectrum Analysis 1
Spectrum analysis 1
Stadtplanung 1
Steam power plants 1
Steam-engines 1
Stencil work 1
Television 1
United States -- Social conditions 1
United States -- Social conditions 1918-1932 1
Urbanisme 1
Vacuum-tubes 1
Wages 1
Water-supply 1
Water-supply engineering 1
X-Rays 1
X-rays 1
Électrotechnique 1
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